Question

3 In AABC, B = 104.3°, C = 31.3°, a = 29-0cm.
Calculate c.​

Answer 1

21.53 m

Explanation:

We can obtain the angle C;

C + 104.3 + 31.3 = 180 ( sin of angles in a triangle)

C = 180 - (104.3 + 31.3)

C = 44.4°

Using Sine rule :

c / sinC = a / sin A

Cross multiply :

c * sin44.4 = 29 * sin 31.3

c * sin44.4 = 15.066054

c = 15.066054 / sin 44.4

c = 15.066054 / 0.6996633

c = 21.533291

c = 21.53 m